Why do you feel toslink is worst? In my opinion coax is the most aggravating, uncertain and ultra dependent upon construction choices whereas an optical wire with standard materials is very consistent and not prone to electrical interference (which the coax is very susceptible to). All I can dig up in archives is reviewers comments that toslink cable does not form tight connection and in their rearrangement practices of pulling components and plugging new wires they may inadvertently pull the toslink cable out. To those I say- execrcise greater care and arrange the wiring neatly. Im my own experience, I have always preferred the richness and bass performance of toslink connection, while the coax has resulted in anemic sound in majority of set-ups. I do concede that a well designed, insulated and tight tolerances in impedance of connectors can bring the coax connection on a par with most toslink cables and offer "real tight" gripping power (you can almost lift components from one end) which the reviewers yearn for.